About this calculator

Extensive sedum mat: 80–120 kg/m² saturated (sedum, substrate, drainage). Semi-intensive: 150–250 kg/m². Intensive (rooftop garden): 400+. EU FLL standard substrate density 1100 kg/m³ wet.

Frequently asked questions

What does the Sedum Green Roof Loading do?

Saturated weight of a sedum or biodiverse green roof — for structural sign-off. Extensive sedum mat: 80–120 kg/m² saturated (sedum, substrate, drainage). Semi-intensive: 150–250 kg/m². Intensive (rooftop garden): 400+. EU FLL standard substrate density 1100 kg/m³ wet.

Is the Sedum Green Roof Loading free to use?

Yes. Every calculator on Calcurly.com is free, works in your browser without sign-up, and can be embedded on your own website.

How accurate is the Sedum Green Roof Loading?

Results are calculated in real time using industry-standard formulas. Treat the output as a well-informed estimate — always cross-check with local regulations, product datasheets, or a qualified green roofs professional before committing to a purchase or a job.

What inputs does the Sedum Green Roof Loading need?

Enter values for: Roof area (m²), Type. Sensible defaults are pre-filled where possible so you can start with a single change.

Can I embed the Sedum Green Roof Loading on my own website?

Yes — copy the iframe snippet at the bottom of this page, or use the Embed Generator to customise the size. The embedded version stays in sync with the live calculator on Calcurly.com.